In glcanvasbox you can manually position elements so yes they can overlap.

 Even if you add other elements after that label you can make it to be on
top using the ZORDER attribute.

Best,
Scuri



On Sun, Aug 24, 2014 at 2:19 AM, Milind Gupta <[email protected]>
wrote:

> Hi,
>         I am using the glcanvasbox and I add 2 controls. I notice that the
> one added later is drawn over the 1st one if their sizes overlap. Is this a
> consistent behaviour?
>         If I want to add a control say iuplabel in the glcanvasbox and I
> want it such that it is displayed on top of any control in that place then
> would iupAppend do the job always?
>
> Thanks,
> Milind
>
>
>
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